How did Sai Baba use the incident with the sweetened tea to reinforce Cholkar's faith?

Sai Baba reinforced Cholkar's faith through a remarkable display of His inner knowing. According to Chapter 15, Cholkar had secretly renounced sugar as a personal penance while he was delayed in fulfilling his vow to Baba. After Cholkar finally arrived in Shirdi and distributed the sugar candy, Baba instructed Cholkar's host, Jog, to 'Give him cups of tea, well-filled with sugar.' These words astonished Cholkar, bringing tears of joy to his eyes. The significance, as the text explains, was to confirm Cholkar's faith and impress upon him the 'stamp of devotion.' Since Baba Himself did not drink tea, the specific request was clearly a sign meant only for Cholkar, proving that his private vow, the delay, and his secret sacrifice were all known to Baba.